Read LG 42LH50YR (CHASSIS:LP91B) Service Manual online
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
RT1C3904-T112
Q1004
E
B
C
+1.8V
AZ1085S-3.3TR/E1
IC1003
1
ADJ/GND
2
OUTPUT
3
INPUT
33K
R1049
10K
R1059
READY
0
R1073
100uF1
6V
C1009
33K
R1065
P_12V
560pF
C1012
RT1C3904-T112
Q1001
E
B
C
10uF
16
V
C1000
0.1uF
C1054
2.2K
R1050
1uF
25
V
C1035
+1.8V_DDR
POWER_SW
BD9130EFJ-E2
IC1001
3
ITH
2
VCC
4
GND
1
ADJ
5
PGND
6
SW
7
PVCC
8
EN
1uF
C1048
1UF
SI4925BDY EBK32753101
Q1003
3
S2
2
G1
4
G2
1
S1
5
D2_1
6
D2_2
7
D1_1
8
D1_2
P_12V
AP1117EG-13
IC1002
1
ADJ/GND
2
OUT
3
IN
3.3K
R1010
+3.3V_MULTI_MST
5.6K
R1058
+12V_LCD
+5V_MULTI
+5V_USB
+1.2V_VDDC_MST
+5V_MULTI
0.1uF
C1014
10K
R1068
10K
R1006
10uF
16
V
C1029
MP2212DN
IC1006
3I
N
2
GND
4B
S
1F
B
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
0.1uF
C1026
22K
R1070
12K
R1008
1.6K
R1069
PANEL_ON
10uF
25
V
C1031
2.2K
R1051
0.01uF
C1010
+5V_MULTI
P_5V
0.1uF
C1015
10uF
C1022
10K
R1048
10uF
16
V
C1019
0.1uF
C1005
10uF
C1016
+5V_MULTI
+5V_TUNER
0.1uF
C1023
2.2K
R1052
100uF
16
V
C1028
0.01uF
C1021
10uF
25
V
C1030
1uF
25
V
C1047
2K
R1009
10uF
16
V
C1004
10uF
16
V
C1013
10uF
16
V
C1018
10uF
16
V
C1025
3.6uH
L1009
300
R1004
150
R1007
+12V_AUDIO
2SC3875S
Q1002
1
2
3
0.1uF READY
C1024
PANEL_STATUS
P_16V
+3.3V_MST
10K
R1003
I-DIM
10K
R1002
0.01uF
C1007
+16V_NTP
FM20020-24
P1000
19
N
C
14
12V
9
5.2V
4
GND
18
24V
13
12V
8
5.2V
3
GND
17
24V
12
GND
7
5.2V
2
Power_On
16
GND
11
GND
6
GND
1N
C
20
INV_ON
15
GND
10
5.2V
5
GND
21
A.DIM
22
Err_Out
23
N
C
24
PWM_DIM
25
+5VST_MST
READY
C1020
P_16V
0
SBL
R1067
+5VST_MST
0
NON_LGD
R1053
RL_ON
10uF
16
V
C1052
2.2uF
C1044
+5VST_MST
10K
R1001
P_5V
0.01uF
C1008
AP2121N-3.3TRE1
IC1007
1
GND
2
VOUT
3
VIN
+5V_MULTI
0.01uF
C1046
2.2uF
16
V
C1045
READY
0.01uF
C1053
10uF
16
V
C1003
OPC_OUT1
P_5V
P_12V
DISP_EN/VAVS_ON
10K
R1047
P_12V
47uF
25
V
C1002
2SC3875S
Q1000
1
2
3
0
READY
R1066
SAM2333
LD1002
P_5V
68uF
35
V
C1006
P_16V
P_12V
+5V_MULTI
0.1uF
C1001
1.2K
R1005
0.01uF
C1011
P_5V
OPC_OUT2
500
L1000
500
L1008
2.2uH
L1002
1K
READY
R1011
68uF 35V
READY
C1027
2K
R1018
READY
3K
R1046
1uF
25
V
READY
C1038
0.1uF
C1036
0.1uF
C1032
1uF
25
V
READY
C1041
0.1uF
C1034
1uF
25
V
READY
C1037
1uF
25
V
READY
C1039
2.2K
R1000
1
K
R1012
L1001
MLB-201209-0120P-N2
MLB-201209-0120P-N2
L1004
MLB-201209-0120P-N2
L1005
MLB-201209-0120P-N2
L1006
MLB-201209-0120P-N2
L1007
MLB-201209-0120P-N2
L1012
MLB-201209-0120P-N2
L1013
10
R1019
0
R1055
100uF
16V
C1017
43K
R1057
0.47uF
C1033
110
R1013
330
R1014
MBW3216-501TF
L1010
100uF
16
V
C1043
0.1uF
C1040
330
R1016
100uF
16
V
C1049
110
R1015
0.1uF
C1042
AP1117EG-13
IC1000
1
ADJ/GND
2
OUT
3I
N
AP1117EG-13
IC1004
1
ADJ/GND
2
OUT
3
IN
10K
R1017
0
L1003
2.2uF
16V
2.2UF
C1048-*1
0
R1056
EAX58017401 Mstar LCD LH50
POWER
H6 LH50
10 12
2008/12/23
DDR2, Vref
MAX 3A
**Switch 12V:P12V **Switch 5V:5V_MULTI -> 1.8V
OUT:3.3V
**5V_MULTI-->1.2V
V0 = 1.25*(1+(R2/R1))
R1
R2
OUT:1.27V
MAX 1A
NTP,AUDIO DSP
R1
MAX 2A
R2
MAX 3A
**5V_MULTI->3.3V->1.8V
**DC-DC CONVERTER_READY 12V->5V_TUNER/USB
OUT:6.8V
V0 = 0.8*(1+(R2/R1))
*ST 5V->3.3V
LED Block
Close to Q1003
R2
R1
R1=R2*((Vo/0.8)-1)
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